Tag Archives: fatty acids

1476-1491 A. Freiberga, A. Ilgaza, S. Jonova, S. Eglite, D. Gorbacevska, A. Plivca, K. Neiberts, M. Zolovs and P. Semjonovs
The effects of microalgae (Tetradesmus obliquus, Spirulina platensis and Chlorella vulgaris) on the nutritional profile of broiler meat
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The effects of microalgae (Tetradesmus obliquus, Spirulina platensis and Chlorella vulgaris) on the nutritional profile of broiler meat

A. Freiberga¹, A. Ilgaza¹, S. Jonova¹, S. Eglite¹, D. Gorbacevska¹, A. Plivca¹, K. Neiberts², M. Zolovs³⁴ and P. Semjonovs²

¹Latvia University of Life Science and Technologies, Faculty of Veterinary Medicine, K. Helmana street 8, LV-3004 Jelgava, Latvia
²University of Latvia, Institute of Biology, Laboratory of Industrial Microbiology and Food Biotechnology, O. Vaciesa street 4, LV-1004 Riga, Latvia
³Statistics Unit, Riga Stradins University, Balozu street 14, Riga, Latvia
⁴Daugavpils University, Institute of Life Sciences and Technology, Department of Biosystematics, Vienibas street 13, LV-5401 Daugavpils, Latvia
*Correspondence: Correspondence: anete.freiberga@lbtu.lv

Abstract:

This study investigated the effect of dietary supplementation with three edible microalgae species (Tetradesmus obliquus, Spirulina platensis, and Chlorella vulgaris) on the nutritional profile of broiler chicken meat. Ross 308 broilers were fed a standard diet enriched with 0.5% of one of the microalgae species over a 43-day fattening period. Meat samples from the breast and thigh muscles were collected on days 35 and 43 to analyse its nutritional profile. Although no statistically significant differences were observed in growth performance, several biologically differences became apparent. C. vulgaris administration was associated with an initial increase in thigh meat fat content on day 35, followed by a notable reduction by day 43, and led to higher protein and polyunsaturated fatty acid levels. However, it resulted in the highest omega-6/omega-3 ratio among the groups. S. platensis contributed to a more favorable fatty acid profile, with the lowest omega-6/omega-3 ratio and increased protein levels, particularly in breast meat. T. obliquus supplementation produced leaner meat, improved vitamin B12 content, and maintained a more balanced omega-6 to omega-3 ratio by day 43, suggesting a cumulative benefit with prolonged feeding. These findings indicate that each microalga has species-specific effects on broiler meat quality, supporting their potential use as sustainable functional feed ingredients tailored to specific nutritional goals in poultry production.

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1544-1552 T. Kyrpa, A. Potrokhov, M. Kharkhota and M. Kuchuk
Detection of changes in the defence factors of Nicotiana Tabacum plant under the influence of insertion and expression of heterologous transgenes (desA, desC, HuINFα-2b)
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Detection of changes in the defence factors of Nicotiana Tabacum plant under the influence of insertion and expression of heterologous transgenes (desA, desC, HuINFα-2b)

T. Kyrpa¹*, A. Potrokhov¹, M. Kharkhota² and M. Kuchuk¹

¹Institute of Cell Biology and Genetic Engineering of NAS of Ukraine, Academika Zabolotnoho Str.148, UA03143 Kyiv, Ukraine
²Institute of Microbiology and Virology named after D.K. Zabolotny, Str. Academika Zabolotnoho, 154, UA03143 Kyiv, Ukraine
*Correspondence: t-kirpa@ukr.net

Abstract:

Genetically modified plants may have some changes in physiological and biochemical reactions depending on the type of transgene. In this study, we present the results of the analysis of tobacco plants with the insertion and expression of the genes for human interferon alpha (HuINFα-2b), Δ12-acyl-lipid desaturase (desA of the cyanobacterium Synechocystis sp. PCC 6803) and Δ9-acyl-lipid desaturase (desC of the cyanobacterium Synechococcus vulcanus). Wild-type tobacco plants were used as a control. The level of accumulation of polyfructans and changes in the fatty acid spectrum in the leaves of plants under normal physiological conditions and after exposure to low temperatures were tested. It was found that all transgenic plants had some changes in the composition of fatty acids, however, only plants with the HuINFα-2b gene insertion had an increased content of polyfructans. These data may indirectly indicate a difference in the two defense strategies of the plant organism depending on the insertion and expression of the transferred gene.

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2359–2372 L. Nadtochii, D. Baranenko, R. Melchakov, M. Muradova, A. Istomin and A. Istomin
Investigation of fly larvae Lucilia Caesar application in pet feed composition
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Investigation of fly larvae Lucilia Caesar application in pet feed composition

L. Nadtochii¹*, D. Baranenko¹, R. Melchakov¹, M. Muradova¹, A. Istomin² and A. Istomin²

¹ITMO University, Faculty of Food Biotechnologies and Engineering, Lomonosov street 9, RU191002 Saint-Petersburg, Russia
²Zooprotein LLC, Soviet street 64, RU398042 Lipetsk, Russia
*Correspondence: l_tochka@itmo.ru

Abstract:

The biomass of insect larvae is world-widely used as a valuable raw material for the pharmaceutical, microbiological, cosmetic industry and feeding production, also in the food industry. There is certain complex technology for processing biomass of insect larvae, which affords to isolate many physiologically active substances – chitin, antimicrobial peptides, fatty acids mixture, organic forms of mineral substances, hormones, etc.
The company New Biotechnology (Lipetsk, Russia) has developed a technical process for producing of the protein-lipid preparation (commercial name is Zooprotein) based on the fly larvae of the species Lucilia Caesar. The utilization of food waste as a substrate, unpretentiousness to cultivating environment and high protein content are capable of considering insects of the species Lucilia Caesar as a promising object of cultivation and a reliable, cheap, replenishable source of nutrients for resource-saving process of the feed production.
On the bases of ITMO University, an investigation is being conducted on the qualitative composition of the Zooprotein and the possibility of pet feed application. Cats are the most demanding animals to the quantitative and qualitative composition of protein fractions of feed. In present research an evidence-based calculation of the balance of the Zooprotein composition is presented as a feed component for cats during growth. Accordingly, the unique chemical composition of the development product based on fly larvae Lucilia Caesar makes possible to maintain that it is a promising functional ingredient in feeding rations for various animal species.

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230-242 E. Samadzadeh Ghale Joughi, E. Majidi Hervan, A.H. Shirani Rad and GH. Noormohamadi
Fatty acid composition of oilseed rapeseed genotypes as affected by vermicompost application and different thermal regimes
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Fatty acid composition of oilseed rapeseed genotypes as affected by vermicompost application and different thermal regimes

E. Samadzadeh Ghale Joughi¹, E. Majidi Hervan¹*, A.H. Shirani Rad² and GH. Noormohamadi¹

¹Department of Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran
²Department of Agronomy, Seed and Plant Improvement Institute, AREEO, Karaj, Iran
*Correspondence: majidi_e@yahoo.com

Abstract:

Vegetable oils with a high relative amount of unsaturated fatty acids are of great significance for human health. Hence, in a 2-year factorial split plot experiment, the effects of different sowing date (optimum (October 17) and late (October 27)), vermicompost (0 and 20 ton ha-1) and genotypes (BAL104, DIE710.08, BAL102, FJL330, FJL290 and Okapi) on the fatty acid composition of rapeseed were evaluated. Rapeseed genotypes and the combination of sowing date and vermicompost application were randomized to sub and main-plots, respectively. The present results revealed that yield, oil percentage and fatty acids composition is affected by sowing dates along with genotypes. However, the unsaturated fatty acid, eicosanoic acid was not affected by interaction sowing date and genotype. Vermicomposting increased the yield, oil percentage, oleic, linoleic and linolenic acids and decrease erucic unsaturated fatty acid. The FJL290 and BAL102 genotypes produced the highest values of grain yield (5,853 and 5,763 kg ha−1, respectively), oil percentage (43.98% and 43.85%, respectively), linoleic % acid (20.51 and 20.37% respectively), oleic % acid (65.23 and 64.93% respectively) and linolenic % acid (7.20 and 7.09% respectively) in comparison to the other genotypes, when they were sown at the optimum sowing date. The FJL290 and BAL102 also accelerated their growth period at the late sowing date. Consequently, oleic, linoleic and linolenic acids had the highest direct and indirect effect influence on grain oil percentage indicating their importance as selection criteria to improve yield and oil quality of rapeseed. Concluding the combination of sowing date, vermicompost and FJL290 and BAL102 lines may be the most favourable cropping strategy for rapeseed production in Iran.

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383-388 S. Cerina, V. Krastina and I. Vitina
Production and Expenses of Enriched Composition Broiler Chicken Meat in Latvia
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Production and Expenses of Enriched Composition Broiler Chicken Meat in Latvia

S. Cerina, V. Krastina and I. Vitina

Research Institute of Biotechnology and Veterinary Medicine “Sigra” of Latvia University of Agriculture, Institūta 1, Sigulda, Latvia; LV–2150, e–mail: sigra@lis.lv

Abstract:

Enriched composition of broiler chicken meat, in comparison with commercial mass production, contains increased levels of ω–6 and ω–3 fatty acids and carotenoids complex, which positively influence human health and prevent risk factors that cause various diseases. The aim of the investigations was to evaluate the possibility of obtaining an enriched composition broiler chicken meat and to evaluate the expenses of production in bio-economic aspects by using vegetable oils that contain an increased amount of ω–6 and ω–3 fatty acids level and an additive of carotenoids complex “Karotinas V”. The feeding trial was carried out with cross ROSS 308 broiler chickens ranging in age from 1–42 days (n  = 300). It was concluded that the combination of oils in broiler chicken feed for producing enriched composition meat is 1.0% flax seed, 1.0% rapeseed and 2.0% soybean oils and 0.1% carotenoids complex. Use of the composition resulted in broiler chicken meat with 27.4% ω–6 and with 8.3% ω–3 fatty acids in total lipids, which is about 3.9% and 3.2 % higher than in the commercial product. Poultry organism metabolic processes are essential factors that determine the carryover levels of fatty acids and carotenoids from feed to meat, and it is impossible to precisely evaluate and calculate these physiological processes in organisms, economically. In the trial, the expense of feed consumption per 1,000 broiler chickens was higher than by using commercial feed but increased the broiler chickens’ live weight, providing a possible 15% increase in total sales revenues for 1,000 broiler chickens. The tested combination of oils resulted in increased levels of ω–6 and ω–3 fatty acids in broiler chickens’ tissue: as a result, income was higher in the experimental group.

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662-667 D. Matt, E. Veromann and A. Luik
Effect of housing systems on biochemical composition of chicken eggs
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Effect of housing systems on biochemical composition of chicken eggs

D. Matt, E. Veromann and A. Luik

Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences,Kreutzwaldi 1, EE51014 Tartu, Estonia; tel: +372 7425 010; e-mail: darja.matt@emu.ee

Abstract:

The aim of this study was to investigate the impact of production system (organic, conventional) on the quality of chicken eggs. Energetic value, carbohydrate, cholesterol, protein, fatty acid, sodium, potassium, phosphorus, dry matter and vitamin contents were evaluated. The mean content of cholesterol was 30%, and potassium 7%, greater in the organic eggs compared with the conventional eggs. No significant difference was found in the content of fatty acids, protein, sodium or dry matter. The organic eggs had considerably lower contents of calcium (2.8 times) compared with eggs from conventional farming. Negligible differences were found in the occurrence of vitamins (vitamin A, vitamin E, vitamin D3). The residues of 45 pesticides and 6 PCB isomers were analyzed in both types of eggs and no residues compounds were found.

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